placed the audio data as a modulated pattern between the perforations of the film print. This required new playback equipment—specifically, the Dolby DA20 processor and film readers. The first film to use Dolby Digital was Batman Returns (1992), but only six theatres worldwide were equipped.
While technology has rendered the literal meaning of “selected theatres” obsolete, the logo’s legacy endures as a case study in how technical specifications can become cultural symbols. Future film historians may view it as the last great analogue-era logo before the homogenization of digital cinema. dolby digital in selected theatres logo